Pulping machinery.



A. F., 0. B. law. F. BAHR.

PULPlNG MACHINERY.

APPLICATION FILED NOV. 26, 19l5.

Patented July 10, 1917.

2 SHEETSSHEET I.

mum]:

,0. B. & W. F. BAHR.

PULPlNG MACHINERY.

APPLICATION FILED NOV. 26, I915.

Patented July 10, 1917.

2 $HEETSSHEET 2 witness lglt AMEL F. BAI-IR, OTTO B. BAHR, AND WILLIAM F. BAHR, OF MARION, INDIANA.

PULPING MACHINERY.

Application filed. November 26, 1915.

To all whom it may concern:

Be it known that we, AMEL F. BAHR, ()TTo l3. BAHR, and Vl ILLIAM F. BAHR, citizens of the United States, residing at Marion, in the county of Grant and State of Indiana, have invented certain new and useful Improvements in Pulping Machinery, of which the following is a specification.

This invention relates to improvements 1n pulping machines designed for the purpose of disintegrating paper stock, or pulp and sulfite chips Without previously preparing or breaking the stuff.

In order to obtaina fair comprehension of the advantageous results or functions of our apparatus, the description thereof may well be premised by explaining that the foregoing operation is best carried out at the present time by the Hollander or beating engine, but in such apparatus the operation is entirely too slow and where old or waste papers are worked over a second time for raw material a very serious objection arises in that the machine mills or grinds some of the fibers too much and others not enough to disintegrate and in the same batch of material worked over, some of the fibers are entirely too short for strength by the time the balance is disintegrated. Again in the known Hollander and beating engine, the stock is sometimes carried over and over the roll and passed between the roll bars or fly bars and the bed plate instead of going around the 'midfeather.

Therefore, to overcome these disadvantages, numerous devices or machines have been placed upon the market at this time, or proposed, in the form of shredders, pulpers, and breakers, but here again in the use of these machines we find very serious disadvantages because of the fact that these old waste papers ordinarily contain bits of rags and string which catch and wind upon the rotating parts to such an extent that it necessitates a shutting down of the machinery until the accumulation has been removed.

Now then, in our pulper, which is especially designed to replace-or may take the place of the Hollander or beating engine, there is no shaft on the intake side of the apparatus or any other parts which are likely to catch or permit accumulation of foreign material, and the stock which once passes through the reducing mechanism must travel around the midfeather to get Specification of Letters Patent.

Serial No. 63,651.

back to the entrance of said mechanism, thereby insuring a better and more'rapid travelof the stock. Where washers are employed for washing lime from the straw stock, bleach from rag rope stock or chemi' cals from any stock, the washers will do the work better because of the fact that the stock in our apparatus is turned over more times in a given length of time and the time that the stock is in the machine to be prepared is also shortened.

Another special feature of our apparatus is the facility with which wads of paper or rags which are prone to get into the opening leading to the reducing-mechanism by reason of the suction thereof or by being forced into such position by weight of the material in the vat, are'acted upon by a reducing element which drills or works at the wads until they are small enough to go into the reducing mechanism, thus obviating any stoppage of the feed of the material in the desired manner. These and such other objects as may hereinafter appear are attained by the novel construction, combination and arrangement of parts to be hereinafter specifically described and claimed. Reference will now be had to the accompanying drawings forming a part of this specification, wherein:

Figure 1 is a side elevation of an apparatus forming an embodiment of this in vention.

Fig. 2 is a horizontal sectional view thereof.

Fig. 3 is a transverse sectional view taken about on the line 33 of Fig. 2.

. Fig. i is an enlarged front elevation of the revolving disk or grindingnelement of the reducing mechanism.

Throughout the following detail description, and on the several figures of the drawings, similar parts are referred to by like reference characters.

Referring to the drawings. and specifically describing this apparatus, the numeral 1 designates a vat or receptacle into which the material to be reduced is adapted to be placed, the receptacle being of elongated formation with rounded end portions or extremities. Extending longitiulinally of the receptacle to a point terminating short of one end of the receptacle is a midfeather 2, one extremity of whichextends laterally ashortdistance as indicated at 3. The outer wall of the vat, at the end of the same cor- ]Patcnted July 10, 1917.. v

responding to the lateral portion 3 of the midfeather, also turns or extends inwardly at approximately the same angle, as indicated at 4, the construction of the walls of the receptacle thereby forming a constricted opening 5. Located at this end of the vat is the reducing mechanism for this apparatus, the same consisting of a. narrow vertically disposed housing 6 arranged transversely of the opening 5 upon the standard or base 7 and in spaced relationto this opening. It will be observed particularly by reference to Figs. 2 and 3 that the inner face of the housing 6 is concave in formation, as indicated at 8 and to this face'is removably secured a stationary grinding member or shell 9 attached by bolts 10 or in any other desired manner. in shape and the smaller opening thereof is disposed to register with the opening 5 of the vat, the said shell thereby establishing communication between the vat and the interior of the chamber or housing 6 which is provided with the lateral opening 11 over which the larger end of the shell 9 is positioned. Mounted within the housingfi upon the end of a horizontally extending shaft 12 is a revoluble grinding element 13 adapted to cooperate with the shell 9 for reducing the stock introduced into the vat 1 as hereinafter described. The shaft 12 is supported upon the standard -7 and provided with an inner bearing 14 and an outer bearing 15 intermediate which is a driving pulley 16 connected with any suitable source of power as customarily employed. The shaft 12 is adjustable longitudinally by means of the hand wheel 17 having worm actuated connection with the shaft whereby the cone 13 may be adjusted toward or from the shell 9 for the purposes of controlling the reducing action of these members upon the material.

The housing 6 as particularly shown in Fig. 1 is provided with a. lateral passage 18 est blishing communication with the vat 1 at one side of the mid-feather 2. This passage leads off from the chamber or housing 6 at the upper portion thereof and tangentially to the cone 13.

From Fig. 4 it will be observed that the cone is provided with an annular series of blades 19 disposed radially of the cone in spaced relation to each other. Intermediate the blades 19 are arranged one or more shorter blades 20, two being shown between each pair of longer blades 19 in the present instance. It will be noted that these shorter blades are arranged at an angle to the longer blades 19 and this arrangement is most effective for obtaining proper disintegration of the material. The pointed end or face of the. cone 13 is provided with a recurved shearing blade 21 which constitutes a banger and acts initially upon the material, or wads thereof that may have formed, as it passes This shell 9 is frusto-conicalinto the mouth of the chamber directing the said material to the blades 19 and 20 and properly breaking or cutting the stock to facilitate said passage. At 22 is shown a wash-out valve as customarily provided for such apparatus.

It will be understood in the use of this apparatus that the stock is introduced into the vat 1 in the customary manner and upon the rapid rotation of the cone 13 the material will be drawn through the constricted opening 5 whereupon it will be ground by the reducing elements hereinbefore described, said material then passing from the chamber 3 through the passage 18 into the vat 1 at the opposite side of the midfeather 2. This material will be acted upon, it will be apparent, by a steady and fast draft. The material after passing through the reducing members must, of course, proceed around the midfeather 2 before it can again be subjected to the grinding action, which insures better and more rapid travel of the stock in addition to uniformity in shredding of the substances. The stock may be heated to'a higher temperature as those skilled in the art to which this invention refers will appreciate because the apparatus does not involve any wood filling to become softened or come out from between the blades of the reducing members employed in its construction. One of the especial features it may be added, is the peculiar arrangement of the stationary grinding member so that repair may readily be made in'caseof breakage or should access'to these 0 parts become necessary for other purposes.

Having thus described our invent-ion, what we claim as new is:

1. A pulping machine comprising a vat, a vertically arranged midfeather extending 05 longitudinally thereof, an extremity of said midfeather extending laterally, the wall of the vat opposite said lateral portion extending inwardly to provide a constricted passage of conical form, a housing arranged in spaced relation to said passage and communicating with the vat at one side of said midfeather, a bodily removable shell arranged between the housing and the passage aforesaid and establishing communication with the housing and the vat at the other side of the midfeather, and a grinding member projecting into the shell and having its longitudinal axis arranged longitudinally of the constricted passage aforesaid, said grinding member havin its forward extremity disposed substantially at the mouth of the constricted passage to prevent material from obstructing the mouth as said material passes into'said shell.

2. A pulping machine comprising a vat, a midfeather extending longitudinally thereof to a point adjacent to one end of said vat,

ing with a midfeather to form a constricte'd opening, reducing mechanism comprising a housing arranged in spaced relation to the constricted opening and having its side Wall concave, said Wall having an opening therethrough, a revoluble grinding member mounted in said housing and projecting ontwvardly of the opening thereof, a shell or grinding member of frusto-conical formation relnovably fixed to the concaved wall of 10 the housing and over its opening and having its smaller opening coinciding in area with the constricted opening of the val: int'lo which shell the revoluble grinding member aforesaid projects, and means forrotating the grinding member.

In testimony whereof W6 aflix our signatures.

AMEL F. BAHR.

@TTO B. BAHR.

WILLIAM F. BAHR. 

